/Engine/Source/Runtime/MovieScene/Public/EntitySystem/MovieSceneEntitySystem.h
Link all systems in a given category
static void LinkCategorySystems ( [UMovieSceneEntitySystemLinker](API\Runtime\MovieScene\EntitySystem\UMovieSceneEntitySystemLinker) * InLinker, [UE::MovieScene::EEntitySystemCategory](API\Runtime\MovieScene\EntitySystem\UE__MovieScene__EEntitySystemCat-) InCategory )